Child B
The prosecution’s theory: Air embolism attempt.
Outcome: Survived
Gestation: Twin 1, female; 31+2 weeks, 1.69 kg (twin sister of Child A)
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Prosecution theory
Air embolism attempt.
Method alleged: Deliberate administration of air via an IV line.
Prosecution experts: Dr Dewi Evans; Dr Sandie Bohin.
Panel view (Feb 2025)
Panel: collapsed from thrombotic emboli originating from a central intravenous catheter, potentially aggravated by maternal anti-phospholipid syndrome. No evidence of air embolism.
Pathology
No fatal outcome — Baby 2 survived. Panel conclusion: she collapsed from thrombotic emboli originating from a central intravenous catheter, potentially aggravated by the mother's anti-phospholipid syndrome; there was no evidence to support air embolism. On the day of the collapse she had a kinked and impacted long venous line that was not heparinised. Her D-dimer was 6219 (normal range 220–500 ng/ml) and her platelets were low at 103 — both indicative of thrombosis.
Natural-cause alternatives identified
- Thrombotic emboli from a kinked, non-heparinised central venous catheter — the Panel's stated cause
- Maternal anti-phospholipid syndrome as an aggravating factor
- Laboratory markers consistent with thrombosis (D-dimer 6219; platelets 103)
What the jury did not hear
- The Panel's conclusion that the collapse was caused by thrombotic emboli from a central venous catheter.
- That the long venous line was kinked, impacted and not heparinised on the day of the collapse.
- The significance of a D-dimer of 6219 (normal 220–500) and platelets of 103 as markers of thrombosis.
Key primary sources
- International Expert Panel — Additional 10 Cases report (June 2025), Panel Baby 2: https://lucyletbyinnocence.com/shoo-lee/International%20Expert%20Panel%20New%20Summary%20Report%20of%20additional%2010%20cases.pdf
- R v Letby sentencing remarks (August 2023)
Read the full long-form analysis →
Sources:
- Court of Appeal judgment (May 2024) and sentencing remarks — judiciary.uk
- Shoo Lee International Expert Panel Report (February 2025) — lucyletbyinnocence.com
- Per-baby trial evidence archive — lucyletbyinnocence.com
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